What is this?
Movie theater
What is this?
Library
What's she doing at the post office?
She's mailing letters
What's she doing at the library?
She's borrowing books.
What are they doing at the department store?
They're shopping
What is this?
Post office
What are they doing at the supermarket?
They're buying groceries
What is this?
Supermarket
What are they doing at the department store?
They're shopping
What is this?
Department store
What's he doing at the park?
He's kicking a ball
What is this?
Park
What's he doing at home?
He's watching movies